What Would Prove a Window Robot Corner-Coverage Percentage?
A window robot corner-coverage percentage needs a defined corner area, a stated meaning of "covered," and results tied to documented test conditions. A photo of a brush or a coloured contact diagram can explain the mechanism, but it cannot establish a measured percentage on its own. Before comparing two numbers, check whether they describe the same area and the same result.
Start with the area behind the number
A percentage describes a portion of a defined whole. For a corner-cleaning claim, you need to know what that whole includes: the entire pane, a perimeter strip, or a specified patch beside a framed corner.
A whole-pane figure can hide the detail you care about. A small uncleaned corner contributes little to the area of a large pane, yet it may be the part you notice after cleaning. A result for the broad pane therefore does not answer a question about the corner alone.
Ask for the boundary of the assessed area. The person reporting the result should show how that boundary relates to the frame and whether the calculation includes the difficult patch beside the bumper-sensor position. Without that definition, two coverage percentages may describe different things.
Separate contact from cleaning
The word "covered" can refer to a cleaning part passing over an area, making contact with it, or leaving it clean enough to meet a stated criterion. Those observations are not interchangeable.
For a contact claim, ask how the test establishes contact. For a cleaning claim, ask how the evaluator decides that the remaining soil meets the test's criterion. A moving robot in a wide shot does not, by itself, resolve either question at a small corner patch.
This guide offers questions for interpreting a claim, not a certified test method or a report of Frewico laboratory results.
| Detail to request | Why it changes the interpretation |
|---|---|
| Assessed area and its boundary | Defines the whole used in the percentage |
| Meaning of "covered" | Separates movement, contact and a cleaning result |
| Criterion for the result | Explains what counts as cleaned or contacted |
| Window, frame and soil conditions | Shows which setup the result describes |
| Repeat runs and variation | Shows whether the headline represents one selected result |
Read a brush illustration as a mechanism explanation
At a framed-window corner, the bumper or sensing structure meets the boundary. The main cleaning pad wipes the broad glass, but it cannot occupy that structure's physical position. A small local glass area may therefore sit outside the pad's full contact.
W5600H has bristles around the bumper-sensor area. They help contact and clean that glass patch, supporting more complete corner cleaning. The brush adds local cleaning contact while the main pad handles the broad pane. Frame geometry, soil and setup still affect the result.
The coloured areas help explain the difference between pad-only contact and brush-assisted contact. Counting coloured pixels in this illustration would not produce a product performance measurement. The overlay has no defined test denominator, cleaning criterion or repeated-run record.
Read the edge-brush mechanism explanation for the physical layout. That structural explanation supports the brush's role without assigning it a numerical coverage result.
Keep test conditions beside the result
A useful report identifies the model, window and frame configuration, the starting soil, pad and brush condition, and the operating setup. It should also say whether the evaluator inspected one pass or a complete routine and how the evaluator recorded the result.
For visual assessments, ask whether the before-and-after views use consistent lighting, viewing position and the same assessed area. Those details help you understand what the images show. They do not turn an ordinary household photograph into a calibrated measurement.
Look beyond the best-looking run. Ask how many runs the report includes and whether it reports variation. This article does not prescribe a minimum sample count; that belongs to a defined test method. A result from one documented setup should remain attached to that setup rather than become a promise for your window.
Compare the definitions before comparing the percentages
If one report assesses whole-pane contact and another assesses cleaned corner glass, their headline percentages do not rank the same outcome. Ask for matching definitions before using the numbers to choose a product.
If the evidence provides only a mechanism photo, you can assess the visible component and its intended contact area. Leave the numerical claim unresolved. For a household check after cleaning, use the glass-zone observation guide; it separates visible results without presenting them as measured coverage.
Frequently asked questions
Can a colour overlay prove corner coverage?
A conceptual overlay explains an intended contact area. A measured claim also needs a defined area, assessment method, conditions and results. Do not calculate a W5600H coverage percentage from the illustration in this article.
Is reaching the frame evidence that the corner is clean?
Frame contact establishes a boundary interaction. The pad's clearance around the bumper-sensor structure can still leave a local glass patch needing additional cleaning contact. W5600H's bristles help address that patch.
Does a higher percentage mean better corner cleaning?
Compare the assessed area and the meaning of the result first. Whole-pane coverage and corner cleaning use different scopes; a larger number alone cannot resolve that difference.
What can I conclude about W5600H without a percentage?
Its bristles help clean glass around the bumper-sensor position that the main pad may not fully contact. That is a specific corner-cleaning function. It does not require an invented measurement or guarantee the same result on different windows.
